They say the youngest kid of a family doesn’t remember himself very clearly because he has learned to rely on the memories of others, who are older and thus possess authority. Where his memory conflicts with theirs, it’s discarded as of little worth. What he believes to be his memory is more accurately described as a rag-bin of others’ memories, their overlapping testimonies of things that happened before his birth, including him. so it wasn’t a smart-ass remark, I don’t know what I know. It was just the truth.